I don't like how the question is setup, both in wording and scenario. Saying "everyone will die unless >50% press blue" sounds more impactful. And pressing red is a free win in this scenario making it a nonchoice. Threshold not being announced or red having some condition would make it more interesting (and at the same time, boring).. unless the point of the question is not to make people discuss blue vs red, but why you should make an irrational decision.